Display Panel Structure for Under-Component Light Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels face challenges in extending the display area to accommodate electronic components, requiring innovative designs that allow image display even in areas with electrical components while maintaining image quality and component functionality.
Innovation Solution
A display panel design featuring a substrate with an inorganic insulating layer, a planarization layer, a pixel definition layer, and a thin film encapsulation layer, including inorganic and organic encapsulation layers, which allows for image display in areas with electrical components by optimizing the thickness and angle of the pixel definition layer and the shape of the encapsulation layers to ensure proper light transmittance and image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display area is extended to include areas with electrical components, then the versatility and functionality of the display apparatus is improved, but the image quality and light transmittance in those areas deteriorate
Solution Approach 1:
The patent applies local quality by creating a pixel definition layer with non-uniform thickness (1.3-2.0 μm) and specific angular orientation (30-40 degrees) in the component area, while maintaining different characteristics in the main display area. The encapsulation layers are also configured with specific thickness variations to optimize light transmittance locally in the component area where electrical components are present, thereby improving light transmission without compromising overall image quality
Solution Approach 2:
The patent changes physical parameters of the pixel definition layer including thickness (1.3-2.0 μm) and side surface angle (30-40 degrees), as well as encapsulation layer thickness and composition. These parameter modifications in the component area enhance light transmittance and enable functional display operation in areas with electrical components, resolving the contradiction between display area extension and light transmittance
2Reliability
If the pixel definition layer thickness is increased to improve component protection, then the reliability is improved, but the light transmittance and image clarity deteriorate
Solution Approach 1:
The patent optimizes the pixel definition layer thickness to a specific range (1.3-2.0 μm) and controls the side surface angle (30-40 degrees) to achieve the right balance between component protection and light transmittance. This precise parameter control ensures sufficient protection for electrical components while maintaining adequate light transmission for clear image display in the component area
3Illumination intensity
If the encapsulation layers are optimized for light transmittance, then the light transmittance is improved, but the protective function and reliability may deteriorate
Solution Approach 1:
The patent employs composite encapsulation structures with multiple layers having different material compositions and thicknesses. This composite approach allows the encapsulation system to simultaneously provide mechanical protection for electrical components and maintain high light transmittance in the component area, resolving the contradiction between protective function and optical performance
Data Source
AI summary
In a display panel including a main display area, a component area including a transmission area, and a peripheral area outside the main display area, the display panel includes: a substrate; an inorganic insulating layer over the substrate and including a first hole corresponding to the transmission area; a planarization layer over the inorganic insulating layer; a pixel definition layer over the planarization layer and having a thickness of 1.3 µm to 2 µm; and a thin film encapsulation layer over the pixel definition layer, wherein an angle between a side surface of the pixel definition layer and an upper surface of the planarization layer is 30 degrees to 40 degrees.